1 files changed, 1 insertions, 1 deletions

diff --git a/docs/admin_api/media_admin_api.md b/docs/admin_api/media_admin_api.md

index 96b3668f2a..d57c5aedae 100644
--- a/docs/admin_api/media_admin_api.md
+++ b/docs/admin_api/media_admin_api.md
@@ -289,7 +289,7 @@ POST /_synapse/admin/v1/purge_media_cache?before_ts=<unix_timestamp_in_ms>
 
 URL Parameters
 
-* `unix_timestamp_in_ms`: string representing a positive integer - Unix timestamp in milliseconds.
+* `before_ts`: string representing a positive integer - Unix timestamp in milliseconds.
 All cached media that was last accessed before this timestamp will be removed.
 
 Response: